RT Journal Article
T1 Effect of Stimulus Size in a Visual ERP-Based BCI under RSVP
A1 Fernández-Rodríguez, Álvaro
A1 Darves-Bornoz, Aube
A1 Velasco-Álvarez, Francisco Javier
A1 Ron-Angevin, Ricardo
K1 Electrónica - Tecnología
AB Rapid serial visual presentation (RSVP) is currently one of the most suitable paradigms foruse with a visual brain–computer interface based on event-related potentials (ERP-BCI) by patientswith a lack of ocular motility. However, gaze-independent paradigms have not been studied as closelyas gaze-dependent ones, and variables such as the sizes of the stimuli presented have not yet beenexplored under RSVP. Hence, the aim of the present work is to assess whether stimulus size has animpact on ERP-BCI performance under the RSVP paradigm. Twelve participants tested the ERP-BCIunder RSVP using three different stimulus sizes: small (0.1 x 0.1 cm), medium (1.9 x 1.8 cm), andlarge (20.05 x 19.9 cm) at 60 cm. The results showed significant differences in accuracy between theconditions; the larger the stimulus, the better the accuracy obtained. It was also shown that thesedifferences were not due to incorrect perception of the stimuli since there was no effect from thesize in a perceptual discrimination task. The present work therefore shows that stimulus size has animpact on the performance of an ERP-BCI under RSVP. This finding should be considered by futureERP-BCI proposals aimed at users who need gaze-independent systems.
PB MPDI
YR 2022
FD 2022
LK https://hdl.handle.net/10630/25764
UL https://hdl.handle.net/10630/25764
LA eng
NO Fernández-Rodríguez, Á.; Darves-Bornoz, A.; Velasco-Álvarez, F.; Ron-Angevin, R. Effect of Stimulus Size in a Visual ERP-Based BCI under RSVP. Sensors 2022, 22, 9505. https:// doi.org/10.3390/s22239505
NO This research is part of the SICODIS project (PID2021-127261OB-I00), which has been jointlyfunded by the Spanish Ministry of Science, Innovation, and Universities (MCIU); the Spanish StateInvestigation Agency (AEI); and the European Regional Development Fund (ERDF). The APC wasfunded by the University of Malaga (Universidad de Málaga).
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026